I like the idea of the buy one and get second half price but if I'm honest I think the 20% off facial with me better because I just want them in the door with me and I will re- book them there and then and offer them a discount of 20% off there next one if they book then,,,, and hopefully they like it that much they will come back for the third and pay full price!
I'm only doing the facials from now on,,,, X